I was bowling a money singles league in 94 when my equipment didn't get back to town with me from a tourney.  Went to the garage and found a black diamond and an old yellow dot were all I had.   I took them both out to the league which was a 6 gamer on first generation Brunswick Armor Plate synthetic.  I threw the yellow dot the first three and shot about 630 without much carry.  Used the black diamond the next three and shot 675 playing a touch deeper than I did with the yellow dot.  I was high in the league for 3 that night.  I tried the black diamond again in an early scratch league about 8 years ago on old anvil lane.  Started with a 160 playing about 8 board.  Moved into 12 and shot 500 the last two.  Carry was as good as with my Inferno.  Very condition specific though.  Not how short the oil is, but more about overall volume, and how worn the surface is.